Development of four magnetic storms in February 1972

Details Development of four magnetic storms in February 1972 Development of four magnetic storms in February 1972

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23.1279c&link_type=abstract

Planetary and Space Science, vol. 23, Sept. 1975, p. 1279-1292.

Computer Science

1

Magnetic Measurement, Magnetic Storms, Ring Currents, Explorer Satellites, Field Aligned Currents, Geomagnetism, Satellite Observation

Scientific paper

The development of four magnetic storms observed by Explorer 45 in February 1972 is described. The storms were observed in the evening quadrant of the inner magnetosphere and ranged in magnitude from small to moderate. It is noted that three of the storms had sudden commencements and that several substorms occurred during the development phases. Evidence is presented for a partial ring current above L = 5 at the beginning of the substorms and for the enhancement of a partial ring below L = 5 after the expansion phase of several substorms. Distortions of the geomagnetic field in the east-west direction which accompanied the substorm expansions are attributed to field-aligned currents flowing from the ionosphere. It is concluded that these observations support the concept of a partial ring current and an eastward electrojet in the evening quadrant.

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